Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 4wnnA 4wnnB 6dhmA 4wnnA 100 9 0 4wnnB 26 100 11 6dhmA 0 0 100 FOLD SIMILARITY (Z-SCORE) 4wnnA 4wnnB 6dhmA 4wnnA 16.2 3 0.3 4wnnB 6.5 17.2 1.5 6dhmA 0 0 74.1